SB 8.19.14
pita prahrada-putras te
tad-vidvan dvija-vatsalah
svam ayur dvija-lingebhyo
devebhyo ’dat sa yacitah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Your father, Virocana, the son of Maharaja Prahlada, was very affectionate toward brahmanas. Although he knew very well that it was the demigods who had come to him in the dress of brahmanas, at their request he delivered to them the duration of his life.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Maharaja Virocana, Bali’s father, was so pleased with the brahmana community that even though he knew that those approaching him for charity were the demigods in the dress of brahmanas, he nonetheless agreed to give it.